Knowledge How can a screened bottom board be modified to reduce drafts? Optimize Hive Warmth and Airflow Control
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Tech Team · HonestBee

Updated 1 day ago

How can a screened bottom board be modified to reduce drafts? Optimize Hive Warmth and Airflow Control


To reduce drafts in a screened bottom board, you should utilize the integrated rail system to install a solid barrier. Many screened bottom boards are manufactured with small rails specifically located underneath the screen mesh. By sliding a corrugated board onto these rails, you effectively "close" the screen from below to block incoming air currents.

Core Insight Screened bottom boards are versatile tools that allow for adjustable ventilation management. By inserting a corrugated board into the underlying rails, you can temporarily convert the open mesh into a solid floor to minimize drafts when external conditions require it.

The Mechanics of Draft Reduction

Utilizing the Built-in Rails

The primary method for modifying airflow relies on the hardware already present on many bottom board models. Look for a set of small rails positioned underneath the screen mesh.

These rails serve as a mounting bracket for auxiliary inserts. They allow for the addition or removal of barriers without disturbing the hive body or the bees above.

The Corrugated Board Insert

The specific component used to stop the draft is a corrugated board. When placed on the rails, this board acts as a physical shield against the wind.

Inserting this board essentially "closes" the screen. This transforms the bottom board's function from a ventilation device into a solid floor, significantly reducing the updrafts that enter the colony.

Understanding the Trade-offs

Impact on Ventilation

While inserting the corrugated board solves the issue of drafts, it inevitably restricts airflow. The primary purpose of a screened bottom board is to facilitate air exchange and debris fall-through.

When you slide the board into place to stop drafts, you are temporarily suspending these ventilation benefits.

Flexibility vs. Permanence

This modification is designed to be temporary and reversible. Unlike permanently sealing a hive, using the rail and board system allows you to adapt to changing weather.

However, beekeepers must remember to monitor the hive conditions. Leaving the board in place when ventilation is actually needed can negate the original purpose of using a screened bottom board.

Making the Right Choice for Your Hive

This modification allows you to toggle your hive's setup based on immediate environmental needs.

  • If your primary focus is draft protection: Slide the corrugated board onto the rails to seal the bottom and preserve internal hive warmth.
  • If your primary focus is maximum ventilation: Remove the corrugated board from the rails to allow full airflow through the mesh screen.

By leveraging the rail and board system, you gain control over the hive's internal environment without requiring complex tools.

Summary Table:

Feature Open Screened Board Modified (with Corrugated Board)
Airflow Level Maximum ventilation Restricted / Minimal drafts
Heat Retention Low (allows updrafts) High (seals hive floor)
Debris Management Falls through mesh Collected on board
Best Used During Summer / High humidity Winter / High wind conditions
Reversibility N/A Fully reversible via rail system

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